Where does “soutil” come from?

soutil (Old French) comes from Latin subtilis, from Latin sub, from Proto-Italic supo, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “soutil”, step by step

StepLanguageWordMeaning
1Latinsubtilisfine, thin, slender; precise, accurate, keen;...
2Latinsubunder, beneath; behind; at the feet of
3Proto-Italicsupounder
4Proto-Indo-Europeanupóunder, below
5Proto-Indo-Europeanh₃ewp-—

Words derived from “soutil”

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Italic supo →